Cement Grouting: Water Minimising Practices

Abstract: Water gives cement grout its mobility, but the water needed for mobility exceeds hydration requirements substantially in most applications. If this excess water is allowed to collect and remain in pockets, it can impair the production of 100% grout filling and may permit long-term deterioration. Construction expedients to minimise the problem has been developed over years of experience. Some aspects of these do not appear to be widely known (bleeding methods) and others (water-cement ratios), although discussed, have received little presentation in the context of cement grouting. This paper reviews the issue. Tests are described, and case histories quoted.